According to the ME, Green was killed by a penetrating gunshot wound to the head. The baby, Mario, was killed by an intermediate-range, penetrating gunshot wound to forehead. Both manners of death were ruled a homicide.

The cause and manner of death for Rebecca Cizek and Katherine Cizek, who would have been a sophomore at Del City High School, are still pending, the ME said.

Daniel Green, 40, was arrested on complaints of first-degree murder in the case.

Police say the suspect and the victims all lived in the home. Family members say Daniel Green was the son of Sallie Green, the brother of Rebecca Cizek, and the uncle of Katherine Cizek and Mario Dominguez.

The baby's father, Amario Dominguez, said he is absolutely devastated. He is vowing to always remember and continue living for his 6-month-old son, his fiancee, Rebecca Cizek, and her daughter, Kathy.

"He was such a happy baby. He was very good. He didn't cry a whole lot and I just loved him so much," said Dominguez.

He said his fiancee was the love of his life.

Dominguez said Daniel Green suffers from schizophrenia, but was taking medication and never showed signs of violence.

Mid-Del Schools issued the following statement Thursday afternoon:

"The faculty and staff of Mid-Del Schools is mourning the loss of one its students today, Katherine Cizek, Del City High School sophomore.

"We extend our heartfelt sympathy to the family during this time of tragic loss. Thank you for your concern at this difficult time."

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Hillary Clinton did not have a State Department email account while she served as America's top diplomat, a senior state department official said Monday, and instead used a personal email account during her four years on the job.